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Submit DetailsPhosphor bronze sleeve bushings, carbon-graphite mechanical seals, and high-load thrust bearings engineered for subsea pumps — preventing high-pressure process fluid leaks in the most demanding environments.
Straightforward answers about our mechanical seals, bushings, and thrust bearings for subsea pumps.
Our sleeve bushings are machined from C93200 phosphor bronze alloy. This material offers high wear resistance and natural corrosion protection in seawater environments, making it suitable for subsea pump shafts under heavy radial loads.
Each seal uses a carbon-graphite rotating face paired with a tungsten carbide stationary seat. The carbon-graphite provides self-lubrication, reducing friction and heat. Every assembly is pressure-tested before shipment to guarantee zero leakage at rated conditions up to 300 bar.
Our high-load thrust bearings are designed to support axial loads up to 150 kN in vertical subsea pump configurations. The segmented pad design accommodates thermal expansion and ensures even load distribution, maintaining precise shaft alignment.
Yes. Our phosphor bronze bushings, carbon-graphite seals, and high-load thrust bearings are engineered as a complete shaft support system. They share compatible dimensions and surface finishes, allowing you to build a reliable assembly for subsea pump applications.
Standard lead time for custom dimensions is 4 to 6 weeks, depending on material availability and machining complexity. We can expedite urgent orders for critical subsea installations — contact our team with your specific requirements.
We offer technical documentation and remote support for installation and maintenance. For complex subsea deployments, our engineers can assist with on-site guidance. Reach out via email or phone to discuss your project.
Core advantages
Carbon-graphite mechanical seals with tungsten carbide seats hold up to 300 bar and 5000 RPM. Each assembly is pressure-tested before shipment to guarantee zero leakage under rated conditions.
Eliminates unplanned shutdowns from seal failure.High-load thrust bearings handle up to 150 kN in vertical pump configurations. Segmented pad design allows thermal expansion and ensures even load distribution, preventing metal-to-metal contact.
Extends bearing life in deepwater installations.Phosphor bronze sleeve bushings are precision-machined from C93200 alloy, providing natural corrosion resistance against seawater and process fluids. Each bushing undergoes dimensional inspection and hardness testing.
Reduces maintenance intervals on pump shafts.Carbon-graphite material provides inherent self-lubrication, reducing friction and heat generation during operation. No external lubrication system required for the mechanical seal assembly.
Simplifies subsea pump design and lowers operating costs.Our thrust bearings are fully compatible with phosphor bronze bushings, creating a unified shaft support solution. Both components are engineered to work together under high radial and axial loads.
One source for matched subsea pump components.The following clarifications govern the interpretation of our product specifications, performance claims, and warranty terms for phosphor bronze sleeve bushings, carbon-graphite mechanical seals, and high-load thrust bearings.
All references to “high-pressure” apply strictly to static and dynamic pressure conditions up to 300 bar (4350 psi) at the seal face, measured at the pump stuffing box. For thrust bearings and bushings, the term refers to axial and radial loads generated by subsea pump operation within the rated hydraulic envelope. Performance outside these defined limits is not covered under standard warranty.
Our carbon-graphite rotating faces are matched exclusively to tungsten carbide stationary seats supplied by Schmoozinelli. Using third-party seats voids the leak-free guarantee. The self-lubricating property of the carbon-graphite grade is optimized for the specific surface finish and flatness of our mating ring; substitution alters friction and wear characteristics.
When we state that high-load thrust bearings are “fully compatible with our phosphor bronze bushings,” this compatibility is limited to dimensional interfaces (shaft diameter, housing bore, and axial stack height) as published in our technical datasheet DS-TB-2024. It does not imply that the bearing alone can replace a full shaft alignment system. Proper installation requires a matched bushing, bearing, and housing assembly per our installation manual.
Zero leakage means no visible fluid passage across the seal faces during hydrostatic pressure testing at 110% of rated working pressure, using water at ambient temperature. In service, a microscopic fluid film (typically less than 0.5 ml/hr) is considered normal and does not constitute a leak. Any claim of leakage must be verified by a 24-hour collection test per API 682.
Standard warranty excludes accelerated wear caused by abrasive particles, sand, or debris entrained in the process fluid. Our phosphor bronze bushings and carbon-graphite seals are designed for clean or filtered subsea water with a maximum particle size of 50 microns. If the pump environment exceeds this specification, a protective strainer or upgraded hard-face seal must be specified at the time of order.